The mission of the Data Resource Center for Child and Adolescent Health (DRC) is to advance the effective use of public data on the status of children’s health and health-related services for children, youth and families in the United States. The DRC does this by providing hands-on access to national, state, and regional data findings from large population-based surveys. Data are collected from parents and thus contribute a much needed voice in the drive to improve the quality of health care for children and youth.

Data from U.S. government sources show a mixed picture of the racial and ethnic gaps among whites, blacks, Asians and Hispanics over the past several decades. We’ve tracked and categorized the areas where the white-black racial gap has narrowed, widened or remained roughly the same. Hispanic and Asian data is also included in years available.

Running from Florida to Maine, I-95 passes through 15 states and several major cities. I-95 serves the most densely populated region of the U.S., the Boston-to-Washington corridor. Peaks and valleys in population density within 5 miles of the interstate show several stretches of continuously built-up area, especially evident from Petersburg, VA to Lewiston, ME. Selected cities along the route are labeled, for reference.

Just over half of the congressional districts in the country have shares of their population under age 5 that are greater than or equal to the national average of 6.4 percent. States with higher percentages of their population under age 5 tend to be found in the West and South. Utah's 3rd congressional district has the highest percentage of young children in its population, with 10.5 percent, and California's 30th has the lowest, at 4 percent.

Population growth in successive decades has followed different trends for states across the country. While many states had early, substantial growth in percentage terms most of that population growth was quite small in numeric terms. In contrast, states with high percentage growth in more recent decades also gained very large numbers of people.

Passing through some of the most sparsely populated territory in the country, I-90 connects Seattle, Chicago, Cleveland, Buffalo, and Boston. Selected cities along the route are labeled, for reference, with cities of 250,000 or more shown in bold and with filled circles.